package com.hmdp.service.impl;

import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONUtil;
import com.hmdp.dto.Result;
import com.hmdp.entity.Shop;
import com.hmdp.entity.ShopType;
import com.hmdp.mapper.ShopTypeMapper;
import com.hmdp.service.IShopTypeService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.CACHE_SHOP_TTL;
import static com.hmdp.utils.RedisConstants.CACHE_SHOT_TYPE_KEY;

/**
 * <p>
 *  服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
public class ShopTypeServiceImpl extends ServiceImpl<ShopTypeMapper, ShopType> implements IShopTypeService {
    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public Result queryTypeList() {
        String shopType = stringRedisTemplate.opsForValue().get(CACHE_SHOT_TYPE_KEY);
        List<ShopType> listType;
        if (!StrUtil.isBlank(shopType)){
            // 使用toList转成list对象，这样存入内存和读取时都不会报错
            listType = JSONUtil.toList(shopType,ShopType.class);
            return Result.ok(listType);
        }
        List<ShopType> list = query().orderByAsc("sort").list();
        if(list == null){
            return Result.fail("店铺类型数据为空");
        }

        stringRedisTemplate.opsForValue().set(CACHE_SHOT_TYPE_KEY, JSONUtil.toJsonStr(list));
        stringRedisTemplate.expire(CACHE_SHOT_TYPE_KEY,CACHE_SHOP_TTL, TimeUnit.MINUTES);
        return Result.ok(list);
    }
}
